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Pregnancy Week 12


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Fetal Development Images - Pregnancy  12
Week 12 fetal development image showing the fetal growth of your baby to date. Medical Illustration Copyright © 2008 Nucleus Medical Art, All rights reserved

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Your Baby's Development This Week

Baby is looking more adorably baby-like as the eyes move closer together, and the ears are settling into their final position. The nervous system is developing and fine-tuning, leading to the arrival of reflexive actions such as sucking. At the end of the week, the vocal cords have formed, although you won't get to hear their effects for months yet. The organs are formed and functioning, for instance the pancreas is producing insulin, the pituitary gland is producing hormones, and bone marrow is producing white blood cells. The baby is now the size of a large plum, about 3.15" long and 1 ounce at the end of the week.

Pregnancy Symptoms You May Feel During Week 12

Many symptoms are lessening or leaving altogether, such as nausea, tender breasts, and fatigue, as the first trimester draws to a close.

While many of the most troublesome pregnancy symptoms of the first trimester have ended, a new one may be starting. Dizziness or fainting might be a problem and is due to the hormone, progesterone increasing blood flow and relaxing blood vessels. Additionally, pregnant women often suffer from lowered blood sugar, which also can contribute to dizziness. To counteract this tendency, make sure to eat frequent small meals, make sure you are getting enough rest, and always stand up slowly.

Your uterus is now the size of a large grapefruit, and is moving from the bottom of the pelvis to the middle of the abdomen, which should relieve some of the pressure on the bladder thereby lessening the frequency of urination for awhile.

Visit With the Obstetrician

Now that the uterus has grown to the grapefruit- sized range and is rising up into the abdomen, the doctor will be palpating the uterus through the abdomen. Every visit, this will be a main component, as the physician will determine where the uterus is at, and later even, the position of the fetus from feeling on your ever-protruding tummy. Ask what you are measuring and record it in your pregnancy journal, along with your weight.

Preparing for Baby

One of the big decisions all new parents must make: cloth or disposable. There is a ton of information out there on what is best for the environment, what is best for baby, and best for parents, too. Then there is question of which ones? Read up on it now, talk to other new parents to see what their experiences and reasons behind their decisions were. Then if choosing cloth, start researching the best deals. Will you buy all your own or use a diaper service? Find out the practical side too. How to clean, how to do nighttime diapering, dealing with messy bowel movement stains, how to do cloth when you are on the road, or have a child in daycare. If you decide to go with disposable, look into bulk buying and if it's really the better deal.

Pregnancy Lifestyle

Since the nausea and queasiness of the first trimester should be subsiding now, it's a good time to start looking seriously at diet and nutrition issues. Pregnancy isn not a free pass to a total feeding frenzy. It is definitely not as simple as "eating for two", either. Today, a woman will need to take into account her body mass index, or BMI, to determine what her ideal weight gain will be. An obese woman might even be advised to lose some weight, through safe and sane methods, during her pregnancy. Talk to your doctor about what a healthy weight goal is for your pregnancy.

The best way to plan for a healthy weight gain is not to go with fatty or sugary empty calories. Have a balanced diet of a variety of fruits, vegetables, whole grains and proteins. Since frequent small meals are best, plan ahead for healthy snacks. Nuts, raisins, cheese, yogurt, and fruit are good choices.

Plan for about 300 extra calories daily, in general. The average weight gain is around 25-35 pounds, but again, that depends on the mother's weight and BMI. Click here to calculate your ideal weight gain with our free pregnancy weight gain calculator

Pregnancy Week 12 Comfort Meter

I feel absolutely wonderful!
I feel pretty good!
I could be feeling better
UGG I feel terrible!


Showing 1 - 10 out of 98 Comments
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Cavel May 18, 2018 12:35:49 AM ET

I'm 12 weeks pregnant. My breast are as tender and swollen as they were before. I hardly have morning sickness now and I can't stomach to eat certain foods anymore. Sometimes I feel dizzy. A funny thing about my pregnancy, when I wake up at 5:00 am In the morning I have to sneeze.

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Adeola Amos Dec 27, 2017 09:10:35 AM ET

I am not to sure i did a To test I show positive and my scan said no pregnant why

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Luna Oct 22, 2017 04:02:47 AM ET

Okay, I am almost at 12 weeks, I'm always hungry 24/7, I get very dizzy by standing up or just randomly walking, I still get nausea fromn time to time, i have sore breasts and my bras are really to tight to wear, I can't eat certain foods I loved to eat all the time 2 to 3 months ago, I get these tight pains here and there lower abdominal but I'm also bloated so can't fit any of my jeans, it's hard to tell if I have a baby bump or not because I'm kind of fluffy, but I've gotten sspottings like 3-4 days of light blood thought they were periods but they were a week 1/2 earlier and later than my normal menstrual cycle, I haven't taken a home pregnancy test but last few months I had all the signs of the beginning first trimester, my emotions are all over the place and brain hurts like it's going to explode, but yet I can feel my pulse everywhere in my body. The question is am I really seriously pregnant? And has any body else had these symptoms?

dev Nov 29, 2017 04:04:32 PM ET

You should take a test, and go see your doctor if you think you are pregnant. at this point if you are pregnant you need to be receiving prenatal care to make sure you and the baby are doing well.

Adeola Amos Dec 27, 2017 09:15:02 AM ET

Yes it happened to me but, i did a home test. it showed, but scan says not pregnant. can you tell why?

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Nicole Sep 28, 2017 09:53:05 PM ET

Am 12 weeks and my first trimester came as a breeze, no vomiting, frequent bathroom trips but, I don't know what is going on with my body. I'm burning up, seems like the inside out very hot. All I want to do is sleep in front of my fan ,never happened before. What is it and what do I do. Even though I am healthy and stay with fluids?

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keddy Sep 4, 2017 06:15:38 AM ET

I am 12 weeks 5 days today.I'm yet to feel the bump.It's my first but I still have slight nausea, food aversions, swollen breasts. Was worried until I saw other people's comments.

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Austin Jul 26, 2017 08:58:39 AM ET

The only thing is I don't eat much as I used to. Don't feel hungry at all.

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Kimberly Jun 12, 2017 02:40:49 PM ET

I'm 12 weeks pregnant and I have up and down days. For the most part, all I want to do is lay down. If I get hot I start to get nauseated, vomiting and dizzy. So ready for the good days.

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Gues31 Apr 9, 2017 09:17:01 PM ET

I keep getting a cold. I'm 12 weeks in, Feel so bad, can't eat or drink.

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MommyP17 Feb 12, 2017 04:27:38 PM ET

I'm 12 wks 5 days with my first. I have good/days. Sometimes all I want to do is eat, other days I'll eat one meal and that's all I can handle. I still have morning sickness, tender breasts/nipples ect. My symptoms have gotten better tho. No visible bump yet, but I can feel my uterus. I'm extremely tired all the time! I have insomnia here and there, now I'm waking up early in the morning. I take a nap in the afternoon. My crazy dreams haven't stopped lol. Had my first scan at 10 wks 6 days, very active baby in there lol. Healthy HB at 175. I'll be having another scan soon. This first trimester has been rough, I hope the second trimester goes a little better.

Samantha Oct 11, 2017 08:44:10 AM ET

I'm 12 weeks now. hb is 177. hope things are well with you.

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Dominique alleng Feb 5, 2017 03:07:09 PM ET

I always have weird, pushing, tight, gassy feelings in my tummy. I am 12 weeks. This is my first pregnancy. I do pass stool every 3 days. Is that not enough? Also does your tummy feel weird the whole pregnancy?

Danielle Oct 24, 2017 09:17:40 PM ET

This is exactly how i feel too. i have never been regular and it's still the same- about every 3 days. i am 12 weeks with my first and my tummy has kind of ached the whole time. i feel bloated even when i haven't eaten.

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